Scripophily.comScripophily.com buys and sells collectible stock and bond certificates. It has a page on the origin of scripophily as a hobby, and characteristics that determine the value of an old certificate, including "age, signature, certificate owners name, rarity, demand for item, aesthetics, type of company, original face value, bankers associated with issuance, transfer stamps, cancellation markings, issued or unissued, printers.”